<?php
$basedir= ROOT_PATH."/application/extra/"; //修改此行为需要检测的目录，点表示当前目录
$auto=1; //是否自动移除发现的BOM信息。1为是，0为否。
 
//以下不用改动
 
if ($dh = opendir($basedir)) {
	while (($file = readdir($dh)) !== false) {
		if ($file!='.' && $file!='..' && !is_dir($basedir."/".$file)){
			echo "filename: $file ".checkBOM("$basedir/$file")."<br />";
		}
	}
	
	closedir($dh);
}
 
function checkBOM ($filename) {
	global $auto;
	$contents=file_get_contents($filename);
	$charset[1]=substr($contents, 0, 1);
	$charset[2]=substr($contents, 1, 1);
	$charset[3]=substr($contents, 2, 1);
 
	if (ord($charset[1])==239 && ord($charset[2])==187 && ord($charset[3])==191) {
		if ($auto==1) {
			$rest=substr($contents, 3);
			rewrite ($filename, $rest);
			return ('<span style="color:red">BOM found, automatically removed.</span>');
		} else {
			return ('<span style="color:red">BOM found.</span>');
		}
	}else {
		return ("BOM Not Found.");
	}
}
 
function rewrite ($filename, $data) {
	$filenum=fopen($filename,"w");
	flock($filenum,LOCK_EX);
	fwrite($filenum,$data);
	fclose($filenum);
}
